docs: def get_fieldsets(self, request, obj=None):
          """
          Fieldsets configuration
          """
          return [
              (None, {
                  'fields': ('type', 'namespace', 'app_title', 'object_name')
              }),
              (_('Generic'), {
                  'fields': (
                      'config.default_published', 'config.use_placeholder', 'config.use_abstract',
                      'config.set_author', 'config.use_related',
                  )
              }),
              (_('Layout'), {
                  'fields': (
                      'config.paginate_by', 'config.url_patterns', 'config.template_prefix',
                      'config.menu_structure', 'config.menu_empty_categories',
                      ('config.default_image_full', 'config.default_image_thumbnail'),
                  ),
                  'classes': ('collapse',)
              }),
              (_('Notifications'), {
                  'fields': (
                      'config.send_knock_create', 'config.send_knock_update'
                  ),
                  'classes': ('collapse',)
              }),
              (_('Sitemap'), {
                  'fields': (
                      'config.sitemap_changefreq', 'config.sitemap_priority',
                  ),
                  'classes': ('collapse',)
              }),
              (_('Meta'), {
                  'fields': (
                      'config.object_type',
                  )
              }),
              ('Open Graph', {
                  'fields': (
                      'config.og_type', 'config.og_app_id', 'config.og_profile_id',
                      'config.og_publisher', 'config.og_author_url', 'config.og_author',
                  ),
                  'description': _(
                      'You can provide plain strings, Post model attribute or method names'
                  )
              }),
              ('Twitter', {
                  'fields': (
                      'config.twitter_type', 'config.twitter_site', 'config.twitter_author',
                  ),
                  'description': _(
                      'You can provide plain strings, Post model attribute or method names'
                  )
              }),
              ('Google+', {
                  'fields': (
                      'config.gplus_type', 'config.gplus_author',
                  ),
                  'description': _(
                      'You can provide plain strings, Post model attribute or method names'
                  )
              }),
          ]